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CN109897502A - The comprehensive cyclic utilization regeneration method of all kinds of waste and old epoxy-based lacquers - Google Patents

The comprehensive cyclic utilization regeneration method of all kinds of waste and old epoxy-based lacquers Download PDF

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Publication number
CN109897502A
CN109897502A CN201910051979.8A CN201910051979A CN109897502A CN 109897502 A CN109897502 A CN 109897502A CN 201910051979 A CN201910051979 A CN 201910051979A CN 109897502 A CN109897502 A CN 109897502A
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parts
waste
epoxy
old
paint
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姚栋
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/62Plastics recycling; Rubber recycling

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Abstract

The invention belongs to paint reclaiming technical field, and in particular to the comprehensive cyclic utilization regeneration method of all kinds of waste and old epoxy-based lacquers.The waste and old coating of epoxy ingredient property and the sorting of other categories are opened first, is concentrated into closed container that cyclohexanone, n-butanol, ethyl carbonate mixed solvent are added again and impregnated 4 hours;Then 300 revs/min of dispersion stirrings of low speed, by temperature automatically controlled 80-110 degree, closed automatic control finer mesh equipment isolates the solidfied material and coat of paint residue because generating with contacts such as water, oil, air and curing agent;Then it carries out indices test and various resins and solid phenolic resin is added according to index request situation, finally sequentially add various auxiliary agents, Lai Pingheng and obtain the requirement for being able to satisfy the epoxy heavy-duty antiseptic paint of various performance indicators.Regeneration technology provided by the invention is simple, and product cost is cheap, and the main product for using a large amount of waste and old epoxy coating and scrapping epoxy coating and stock, it is convenient to collect, and reduces resource waste.

Description

The comprehensive cyclic utilization regeneration method of all kinds of waste and old epoxy-based lacquers
Technical field
The invention belongs to paint reclaiming technical field, and in particular to a kind of comprehensive cyclic utilization of all kinds of waste and old epoxy-based lacquers Regeneration method.
Background technique
With the high speed development of China's industrial project, the increasingly raising of people's living standard.Caused by industrial and civilian The wastes explosion type such as associated scrap and landfill product increases, and yield is huge.
The only coating known to us one, through inspection information, about 53,470,000 tons of hazardous waste garbage.According to incomplete system Meter, it is 300,000 tons that dangerous waste paint residue yield is only in China 2017!
Coating in process of production, is related to resins synthesis, and use a variety of industrial chemicals such as organic solvent and auxiliary agent mostly. Simultaneously also containing largely as various macromolecular organic compounds and nano level superfine inorganic material etc. such as thickener and dispersing agents. Such as titanium dioxide, kaolin and various colored pigments.Paint residue containing these ingredients and coating is scrapped if do not done innoxious place It sets or is subject to resource and live again utilization, it will environment is caused seriously to pollute, becomes " environment malignant tumor ".
All kinds of epoxy heavy-duty anticorrosive coating equipment and steel with failure are scrapped for shipyard, oil plant, power plant, chemical plant etc. Structure, used all kinds of epoxy heavy-duty anticorrosive coatings are unqualified or expired when carrying out protective coating and product that is scrapping accounts for a big portion Point, if directly discarded without recycling, not only result in waste of resources, and current environment protection and Green Development are had become Distinct themes of the times are inconsistent, and environmental pollution improvement is both the basic guarantor of the efforts at environmental protection most important thing and Green Development Barrier promotes industry to go on the track of benign sustainable development, final to realize that the very big of environmental quality improves and improve, so by this The unqualified or expired coating Product recycling discarded a bit is processing modified, comprehensive cyclic utilization regenerates, and turning waste into wealth is one The significant task of item.
Summary of the invention
It is an object of the invention to provide a kind of synthesis of all kinds of waste and old epoxy-based lacquers aiming at the problems existing in the prior art Recycle regeneration method.
The technical scheme is that
The comprehensive cyclic utilization regeneration method of all kinds of waste and old epoxy-based lacquers, includes the following steps:
One: the waste and old epoxy-based lacquers coating of the heavy antisepsis that factory's coating decoration gets off first and other categories are by base ingredients point It picks out, the waste and old coating of heavy antisepsis of epoxy ingredient property that sorting is opened is concentrated into closed container, then by cyclohexanone, positive fourth Alcohol, ethyl carbonate mixed solvent are added in closed container and stir evenly, and then carry out immersion 4 hours or more, and must give up paint A;
Two, by the closed container for containing useless paint A in step 1, it is put into blender, starts blender, with 300 revs/min Speed carries out dispersion stirring 1 hour or more, while being heated, and temperature is kept when temperature reaches when 80-110 is spent, by closed Automatic control finer mesh equipment filter out impurity, must give up paint B, the strainer used be 200-400 mesh screen;
Three, indices test is carried out to useless paint B, according to index request situation, adds solid phenolic resin, then successively Bentonite, levelling agent, adhesion promoter and defoaming agent, Lai Pingheng and the epoxy heavy antisepsis for meeting various performance indicators is added Paint, then successively carry out grinding distribution to particle fineness and be less than 20 μm, test, barrelling, obtain finished product epoxy heavy-duty antiseptic paint.
Specifically, by the waste and old coating total amount of the heavy antisepsis that coating decoration gets off be 60 parts by weight in terms of, the solid of the addition The amount of phenolic resin is 20-30 parts, 2-4 parts of cyclohexanone, 2-3 parts of n-butanol, 5-6 parts of ethyl carbonate, 2-3 parts of bentonite, levelling 0.4-0.6 parts of agent, 0.4-0.6 parts of adhesion promoter and 0.4-0.6 parts of defoaming agent.
Specifically, by the waste and old coating total amount of the heavy antisepsis that coating decoration gets off be 60 parts by weight in terms of, the solid of the addition The amount of phenolic resin is 25 parts, 3 parts of cyclohexanone, 2.5 parts of n-butanol, 5.5 parts of ethyl carbonate, 2.5 parts of bentonite, levelling agent 0.5 Part, 0.5 part of adhesion promoter and 0.5 part of defoaming agent.
Specifically, the grinding distribution time is 2-3.5 hours in the step three.
Specifically, being and water, oil, air and solid using automatically controlling the impurity that filters out of finer mesh in the step two The solidfied material and coat of paint residue that the contacts such as agent generate.
The beneficial effects of the present invention are: the waste in order to solve the problems, such as the waste and old waste and old coating of epoxy heavy antisepsis, the present invention A kind of comprehensive cyclic utilization regeneration method to all kinds of waste and old epoxy-based lacquers is provided, the lytic agent used has strong solubility, energy The main base of the enough waste and old coating of epoxy heavy antisepsis for guaranteeing recycling can dissolve, and joined solid phenol-formaldehyde in regenerative process Resin component, to change the performance of new product, the new product regenerated faster compared with universal epoxy coating rate of drying, resistance to punching Hitting property is stronger, and acid-proof alkaline is excellent, and regenerated coating solids are high, and one-pass film-forming thickness is big, and film is finer and close, reduces painting Film road number, saves a large amount of cost of labor, so as to extend the corrosion protection service life of equipment, obtains good economic results in society.
Regeneration technology provided by the invention is simple, and product cost is cheap, main using a large amount of waste and old epoxy coating and report Useless epoxy coating stock, it is convenient to collect, and reduces waste, can be realized energy-saving and environment-friendly realistic meaning, saved preciousness Resource, make resource recyclable regenerative, be a kind of technical solution being extremely worth of widely use.
Specific embodiment
It, below will be to the embodiment of the present invention in order to keep the purposes, technical schemes and advantages of the embodiment of the present invention clearer In technical solution be clearly and completely described.It is to indicate actual conditions person according to normal conditions or in manufacture in embodiment It is recommended that condition carry out.Production firm person is not specified in agents useful for same, is the conventional products that can be obtained by commercially available purchase.
The comprehensive cyclic utilization regeneration method of all kinds of waste and old epoxy-based lacquers, includes the following steps:
One: the waste and old epoxy-based lacquers coating of the heavy antisepsis that factory's coating decoration gets off first and other categories are by base ingredients point It picks out, the waste and old coating of heavy antisepsis of epoxy ingredient property that sorting is opened is concentrated into closed container, then by cyclohexanone, positive fourth Alcohol, ethyl carbonate mixed solvent are added in closed container and stir evenly, and then carry out immersion 4 hours or more, and must give up paint A;
Two, by the closed container for containing useless paint A in step 1, it is put into blender, starts blender, with 300 revs/min Speed carries out dispersion stirring 1 hour or more, while being heated, and temperature is kept when 80-110 is spent when temperature reaches, use is closed The impurity that filters out of automatic control finer mesh equipment be the solidfied material and paint generated with contacts such as water, oil, air and curing agent Skin residue, must give up paint B, and the strainer used is 200-400 mesh screen;
Three, indices test is carried out to useless paint B, according to index request situation, adds solid phenolic resin, then successively Bentonite, levelling agent, adhesion promoter and defoaming agent, Lai Pingheng and the epoxy heavy antisepsis for meeting various performance indicators is added Paint, then successively carry out grinding distribution to particle fineness and be less than 20 μm, test, barrelling, finished product epoxy heavy-duty antiseptic paint is obtained, is ground Grinding jitter time is 2-3.5 hours, and the waste and old coating total amount of the heavy antisepsis to be got off by coating decoration is the addition in terms of 60 parts by weight Solid phenolic resin amount be 20-30 parts, 2-4 parts of cyclohexanone, 2-3 parts of n-butanol, 5-6 parts of ethyl carbonate, bentonite 2-3 Part, 0.4-0.6 parts of levelling agent, 0.4-0.6 parts of adhesion promoter and 0.4-0.6 parts of defoaming agent.
Preferably, in terms of by the waste and old coating total amount of the heavy antisepsis that coating decoration gets off for 60 parts by weight, the solid of the addition The amount of phenolic resin is 25 parts, 3 parts of cyclohexanone, 2.5 parts of n-butanol, 5.5 parts of ethyl carbonate, 2.5 parts of bentonite, levelling agent 0.5 Part, 0.5 part of adhesion promoter and 0.5 part of defoaming agent.
To make the purpose of the present invention, technical solution and effect clearer, clear and definite, combined with specific embodiments below to this hair It is bright to be described further, it should be understood that the specific embodiments described herein are merely illustrative of the present invention, is not used to limit Technical solution provided by the present invention.
Embodiment 1
The present embodiment provides the comprehensive cyclic utilization regeneration methods of all kinds of waste and old epoxy-based lacquers, include the following steps:
One: first sorting the waste and old epoxy-based lacquers coating of heavy antisepsis that coating decoration gets off by base ingredients with other categories It opens, the waste and old coating of heavy antisepsis of epoxy ingredient property that sorting is opened is concentrated into closed container, then by cyclohexanone, positive fourth Alcohol, ethyl carbonate mixed solvent are added in closed container and stir evenly, and then carry out immersion 4 hours or more, and must give up paint A;
Two, by the closed container for containing useless paint A in step 1, it is put into blender, starts blender, with 300 revs/min Speed carries out dispersion stirring 1 hour or more, while being heated, and keeps temperature when temperature reaches 80 degree, using it is closed from The impurity that dynamic control finer mesh equipment filters out is that the solidfied material generated with contacts such as water, oil, air and curing agent and coat of paint are residual Slag, must give up paint B, and the strainer used is 200 mesh screens;
Three, indices test is carried out to useless paint B, according to index request situation, adds solid phenolic resin, then successively Bentonite, levelling agent, adhesion promoter and defoaming agent, Lai Pingheng and the epoxy heavy antisepsis for meeting various performance indicators is added Paint, then successively carry out grinding distribution to particle fineness and be less than 20 μm, test, barrelling, finished product epoxy heavy-duty antiseptic paint is obtained, is ground Grinding jitter time is 2 hours.
In the present embodiment by the waste and old epoxy-based lacquers coating total amount of the heavy antisepsis that coating decoration gets off be 60 parts by weight in terms of, it is described plus The amount of the solid phenolic resin entered is 25 parts, 3 parts of cyclohexanone, 2.5 parts of n-butanol, 5.5 parts of ethyl carbonate, 2.5 parts of bentonite, flows 0.5 part of flat agent, 0.5 part of adhesion promoter and 0.5 part of defoaming agent.
Obtained finished product epoxy heavy-duty antiseptic paint is tested, test result is as follows shown in table:
The super national standard now executed of the finished product epoxy heavy-duty antiseptic paint partial properties index that the present embodiment obtains, can meet each The needs of class heavy antisepsis construction coating.
Embodiment 2
The present embodiment provides the comprehensive cyclic utilization regeneration methods of all kinds of waste and old epoxy-based lacquers, include the following steps:
One: the waste and old epoxy-based lacquers coating of the heavy antisepsis that factory's coating decoration gets off first and other categories are by base ingredients point It picks out, the waste and old coating of heavy antisepsis of epoxy ingredient property that sorting is opened is concentrated into closed container, then by cyclohexanone, positive fourth Alcohol, ethyl carbonate mixed solvent are added in closed container and stir evenly, and then carry out immersion 4 hours or more, and must give up paint A;
Two, by the closed container for containing useless paint A in step 1, it is put into blender, starts blender, with 300 revs/min Speed carries out dispersion stirring 1 hour or more, while being heated, and keeps temperature when temperature reaches 80 degree, using it is closed from The impurity that dynamic control finer mesh equipment filters out is that the solidfied material generated with contacts such as water, oil, air and curing agent and coat of paint are residual Slag, must give up paint B, and the strainer used is 200 mesh screens;
Three, indices test is carried out to useless paint B, according to index request situation, adds solid phenolic resin, then successively Bentonite, levelling agent, adhesion promoter and defoaming agent, Lai Pingheng and the epoxy heavy antisepsis for meeting various performance indicators is added Paint, then successively carry out grinding distribution to particle fineness and be less than 20 μm, test, barrelling, finished product epoxy heavy-duty antiseptic paint is obtained, is ground Grinding jitter time is 3 hours.
In the present embodiment by the waste and old coating total amount of the heavy antisepsis that coating decoration gets off be 60 parts by weight in terms of, the addition is consolidated The amount of body phenolic resin is 20 parts, 4 parts of cyclohexanone, 3 parts of n-butanol, 6 parts of ethyl carbonate, 3 parts of bentonite, 0.6 part of levelling agent, attached 0.6 part and 0.6 part of defoaming agent of adhesion promoter.
Obtained finished product epoxy heavy-duty antiseptic paint is tested, test result is as follows shown in table:
The super national standard now executed of the finished product epoxy heavy-duty antiseptic paint partial properties index that the present embodiment obtains, can meet each The needs of class heavy antisepsis construction coating.
Embodiment 3
The present embodiment provides the comprehensive cyclic utilization regeneration methods of all kinds of waste and old epoxy-based lacquers, include the following steps:
One: the waste and old epoxy-based lacquers coating of the heavy antisepsis that factory's coating decoration gets off first and other categories are by base ingredients point It picks out, the waste and old coating of heavy antisepsis of epoxy ingredient property that sorting is opened is concentrated into closed container, then by cyclohexanone, positive fourth Alcohol, ethyl carbonate mixed solvent are added in closed container and stir evenly, and then carry out immersion 4 hours or more, and must give up paint A;
Two, by the closed container for containing useless paint A in step 1, it is put into blender, starts blender, with 300 revs/min Speed carries out dispersion stirring 1 hour or more, while being heated, and keeps temperature when temperature reaches 80 degree, using it is closed from The impurity that dynamic control finer mesh equipment filters out is that the solidfied material generated with contacts such as water, oil, air and curing agent and coat of paint are residual Slag, must give up paint B, and the strainer used is 200 mesh screens;
Three, indices test is carried out to useless paint B, according to index request situation, adds solid phenolic resin, then successively Bentonite, levelling agent, adhesion promoter and defoaming agent, Lai Pingheng and the epoxy heavy antisepsis for meeting various performance indicators is added Paint, then successively carry out grinding distribution to particle fineness and be less than 20 μm, test, barrelling, finished product epoxy heavy-duty antiseptic paint is obtained, is ground Grinding jitter time is 3.5 hours.
In the present embodiment by the waste and old epoxy-based lacquers coating total amount of the heavy antisepsis that coating decoration gets off be 60 parts by weight in terms of, it is described plus The amount of the solid phenolic resin entered is 30 parts, 2 parts of cyclohexanone, 2 parts of n-butanol, 5 parts of ethyl carbonate, 2 parts of bentonite, levelling agent 0.4 part, 0.4 part of adhesion promoter and 0.4 part of defoaming agent.
Obtained finished product epoxy heavy-duty antiseptic paint is tested, test result is as follows shown in table:
The super national standard now executed of the finished product epoxy heavy-duty antiseptic paint partial properties index that the present embodiment obtains, can meet each The needs of class heavy antisepsis construction coating.
The present invention provides the comprehensive cyclic utilization regeneration method of all kinds of waste and old epoxy-based lacquers, focuses on regeneration technology, is added Various auxiliary agents are not limited only to several examples enumerated above, in order to meet various performances epoxy heavy-duty antiseptic paint requirement, The amount of the solid phenolic resin of addition, and the bentonite, levelling agent, adhesion promoter and the defoaming agent that are added can be adjusted Amount and the proportionate relationship between them, such as when according to requiring production smoothness is good and wearability is good epoxy heavy-duty antiseptic paint, The amount of solid phenolic resin can suitably be increased, the smoothness and wearability for the epoxy heavy-duty antiseptic paint produced in this way are with regard to more preferable It is some.
Finally it should be noted that: the above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof;To the greatest extent The present invention is described in detail with reference to preferred embodiments for pipe, it should be understood by those ordinary skilled in the art that: still It can modify to a specific embodiment of the invention or some technical features can be equivalently replaced;Without departing from this hair The spirit of bright technical solution should all cover within the scope of the technical scheme claimed by the invention.

Claims (5)

1. the comprehensive cyclic utilization regeneration method of all kinds of waste and old epoxy-based lacquers, which comprises the steps of:
One: first sorting the waste and old epoxy-based lacquers coating of heavy antisepsis that factory's coating decoration gets off by base ingredients with other categories It opens, the waste and old coating of heavy antisepsis of epoxy ingredient property that sorting is opened is concentrated into closed container, then by cyclohexanone, positive fourth Alcohol, ethyl carbonate mixed solvent are added in closed container and stir evenly, and then carry out immersion 4 hours or more, and must give up paint A;
Two, by the closed container for containing useless paint A in step 1, it is put into blender, starts blender, with 300 revs/min of speed Carry out dispersion stirring 1 hour or more, while being heated, keep temperature when temperature reaches when 80-110 is spent, by it is closed from Dynamic control finer mesh equipment filters out impurity, obtained filtrate is cooled down to obtain useless paint B, the strainer used is 200-400 mesh screen;
Three, indices test is carried out to useless paint B, according to index request situation, adds solid phenolic resin, then sequentially add Bentonite, levelling agent, adhesion promoter and defoaming agent, Lai Pingheng and the epoxy heavy-duty antiseptic paint for meeting various performance indicators, then It successively carries out grinding distribution to particle fineness and is less than 20 μm, test, barrelling, obtain finished product epoxy-based lacquers.
2. the comprehensive cyclic utilization regeneration method of all kinds of waste and old epoxy-based lacquers according to claim 1, which is characterized in that with coating The waste and old coating total amount of the heavy antisepsis constructed is 60 parts by weight meters, the amount of the solid phenolic resin of the addition is 20-30 parts, 2-4 parts of cyclohexanone, 2-3 parts of n-butanol, 5-6 parts of ethyl carbonate, 2-3 parts of bentonite, 0.4-0.6 parts of levelling agent, adhesive force promote 0.4-0.6 parts and defoaming agent 0.4-0.6 parts of agent.
3. the comprehensive cyclic utilization regeneration method of all kinds of waste and old epoxy-based lacquers according to claim 1, which is characterized in that with coating The waste and old coating total amount of the heavy antisepsis constructed is 60 parts by weight meters, and the amount of the solid phenolic resin of the addition is 25 parts, ring 3 parts of ketone, 2.5 parts of n-butanol, 5.5 parts of ethyl carbonate, 2.5 parts of bentonite, 0.5 part of levelling agent, 0.5 part of adhesion promoter and 0.5 part of defoaming agent.
4. the comprehensive cyclic utilization regeneration method of all kinds of waste and old epoxy-based lacquers according to claim 1, which is characterized in that described The grinding distribution time is 2-3.5 hours in step 3.
5. the comprehensive cyclic utilization regeneration method of all kinds of waste and old epoxy-based lacquers according to claim 1, which is characterized in that described Solidification in step 2 using the impurity that finer mesh filters out is automatically controlled to be generated with contacts such as water, oil, air and curing agent Object and coat of paint residue.
CN201910051979.8A 2019-01-21 2019-01-21 The comprehensive cyclic utilization regeneration method of all kinds of waste and old epoxy-based lacquers Pending CN109897502A (en)

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Application Number Priority Date Filing Date Title
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Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1931928A (en) * 2006-09-05 2007-03-21 山东建筑大学材料科学研究所 Paint slag regenerating process
CN102558938A (en) * 2012-02-27 2012-07-11 南京英泰柯环保科技发展有限公司 Method for preparing paint raw material from paint waste residue
CN105153878A (en) * 2015-10-09 2015-12-16 泉州市天龙环境工程有限公司 Method for preparing epoxy zinc-rich paint by utilizing paint slag
CN105219208A (en) * 2015-10-08 2016-01-06 陈曦 A kind of preparation method of epoxy novolac nano anticorrosive coating
CN105880261A (en) * 2016-05-18 2016-08-24 湖南省小尹无忌环境能源科技开发有限公司 Resource utilization method of paint slag
CN106118350A (en) * 2016-06-28 2016-11-16 泰安乐邦漆业有限公司 A kind of epoxy coating and preparation method thereof
RU2623767C1 (en) * 2016-08-16 2017-06-29 Федеральное государственное бюджетное образовательное учреждение высшего образования "Национальный исследовательский Московский государственный строительный университет" (НИУ МГСУ) Epoxide composition
CN106978043A (en) * 2017-04-21 2017-07-25 深圳市阿斯顿漆业新技术有限公司 Regeneration paint slag, its preparation method and its application
CN107936765A (en) * 2017-11-29 2018-04-20 天津科瑞达涂料化工有限公司 A kind of anticorrosive paint of casting pipe and its application
CN108003689A (en) * 2017-12-01 2018-05-08 成都信达高分子材料有限公司 A kind of epoxy resin zinc-rich double antiseptic powder coating

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1931928A (en) * 2006-09-05 2007-03-21 山东建筑大学材料科学研究所 Paint slag regenerating process
CN102558938A (en) * 2012-02-27 2012-07-11 南京英泰柯环保科技发展有限公司 Method for preparing paint raw material from paint waste residue
CN105219208A (en) * 2015-10-08 2016-01-06 陈曦 A kind of preparation method of epoxy novolac nano anticorrosive coating
CN105153878A (en) * 2015-10-09 2015-12-16 泉州市天龙环境工程有限公司 Method for preparing epoxy zinc-rich paint by utilizing paint slag
CN105880261A (en) * 2016-05-18 2016-08-24 湖南省小尹无忌环境能源科技开发有限公司 Resource utilization method of paint slag
CN106118350A (en) * 2016-06-28 2016-11-16 泰安乐邦漆业有限公司 A kind of epoxy coating and preparation method thereof
RU2623767C1 (en) * 2016-08-16 2017-06-29 Федеральное государственное бюджетное образовательное учреждение высшего образования "Национальный исследовательский Московский государственный строительный университет" (НИУ МГСУ) Epoxide composition
CN106978043A (en) * 2017-04-21 2017-07-25 深圳市阿斯顿漆业新技术有限公司 Regeneration paint slag, its preparation method and its application
CN107936765A (en) * 2017-11-29 2018-04-20 天津科瑞达涂料化工有限公司 A kind of anticorrosive paint of casting pipe and its application
CN108003689A (en) * 2017-12-01 2018-05-08 成都信达高分子材料有限公司 A kind of epoxy resin zinc-rich double antiseptic powder coating

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Application publication date: 20190618